I live in Nebraska and have a 1900 square foot stone-built home with a 20-year-old Carrier gas furnace and air conditioner. I'm considering replacing them. The Carrier representative visited me and gave me several options (heat pump and Infinity 96, two-stage furnace and ac, variable furnace and ac, etc.). I also called an independent contractor, who told me he carries TempStar, which he said is manufactured by Carrier. I don't think this is true, is it? From what I can find on the Internet, TempStar seems to be made by ICP and Carrier is a United Technologies product. Are they actually manufactured by the same manufacturer? Are TempStars as good as Carriers? Or should I call the Lennox representative and ask him for a quote, too? Thanks for your help!